Study on Some Nonlinear Dynamics Problems of Rotor-sliding Bearing System with Impact-rubbing

2013 ◽  
Vol 12 (17) ◽  
pp. 4089-4094
Author(s):  
Dang Pei ◽  
Tan Lian
Keyword(s):  
Nonlinear Dynamics ◽  
Sliding Bearing ◽  
Dynamics Problems ◽  
Bearing System

Dynamic Behavior Analysis of Three-Span Rotor-Bearing System with Rub-Impact Fault

2012 ◽  
Vol 460 ◽  
pp. 160-164 ◽  
Author(s):  
Song He Zhang ◽  
Yue Gang Luo ◽  
Bin Wu ◽  
Bang Chun Wen
Keyword(s):  
Nonlinear Dynamics ◽  
Behavior Analysis ◽  
Dynamic Model ◽  
Dynamic Behavior ◽  
Rotor System ◽  
System Response ◽  
Rotor Bearing ◽  
Set Up ◽  
Bearing System ◽  
Main Influence

The dynamic model of the three-span rotor-bearing system with rub-impact fault was set up. The influence to nonlinear dynamics behaviors of the rotor-bearing system that induced by rub-impact of one disc, two discs and three discs were numerically studied. The main influence of the rotor system response by the rub-impact faults are in the supercritical rotate speed. There are mutations of amplitudes in the responses of second and third spans in supercritical rotate speed when rub-impact with one disc, and there are chaotic windows in the response of first span, and jumping changes in second and third spans when rub-impact with two or three discs.

scholarly journals Nonlinear Dynamics Analysis of Tilting Pad Journal Bearing-Rotor System

2011 ◽  
Vol 18 (1-2) ◽  
pp. 45-52 ◽  
Author(s):  
Jiayang Ying ◽  
Yinghou Jiao ◽  
Zhaobo Chen
Keyword(s):  
Nonlinear Dynamics ◽  
System Dynamics ◽  
Journal Bearing ◽  
Rotor System ◽  
Moment Of Inertia ◽  
Dynamics Analysis ◽  
Tilting Pad ◽  
Rotor Bearing ◽  
Tilting Pad Journal Bearing ◽  
Bearing System

The nonlinear dynamics theory is increasingly applied in the dynamics analysis of tilting pad journal bearing-rotor system. However, extensive work on system dynamics done previously neglects the influence caused by the moment of inertia of the pad. In this paper, a comparison is made between the responses of the rotor in the bearings with and without pad inertia effect. Taking the Jeffcott rotor system as an example, the characteristics of bearing-rotor system, such as bifurcation diagram, cycle response, frequency spectrum, phase trajectories, and Poincaré maps, were attained within a certain rotation rate range. The pivotal oil-film force of tilting pad journal bearing was calculated by database method. The results directly demonstrate that considering the influence of the pad moment of inertia, system dynamics characteristics are found more complicated when rotor-bearing system works around natural frequency and system bifurcation is observed forward when rotor-bearing system works on high-speed range.

Research on a rigid rotor-sliding bearing system with a squeeze film damper

2001 ◽  
Vol 5 (3) ◽  
pp. 224-229 ◽  
Author(s):  
Yong-zhong Lu ◽  
Dao-xun Liao ◽  
Qi-bai Huang
Keyword(s):  
Squeeze Film ◽  
Rigid Rotor ◽  
Sliding Bearing ◽  
Squeeze Film Damper ◽  
Bearing System

DESIGN AND TRIAL OF INTELLIGENT SLIDING BEARING SYSTEM

2008 ◽  
Vol 07 (01) ◽  
pp. 123-126
Author(s):  
YINGXIN YANG ◽  
MIN LIN ◽  
YUCHUN KUANG ◽  
YONG LIU ◽  
DEMING LIU
Keyword(s):  
Early Warning ◽  
Operating Mechanism ◽  
Test Results ◽  
Sliding Bearing ◽  
Basic Operating ◽  
Bearing System

A patented intelligent sliding bearing system of roller cone bit is invented to monitor radial wear and to stop the running of bearing automatically when the wear reaches the predetermined limit so as to prevent the wear-induced cone loss by early warning. In this paper, the basic operating mechanism of new bearing is stated and discussed. A series of tests are conducted to investigate the mechanical features and the reliability of the new bearing system. The performance of the system is proven to be adequate by the test results.

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